Hi… I love DROX products. I’ using a XY-WJ01 Digital timer. It’s working well, but I have a strange effect.

I’m using the timer in
Mode P6 with OP:600, CL1,LOP:1 .

I’m tryign to get the relay to tunr on at power on, stay o for 600 seconds (10 minutes). then turn off, and not repeat until the power is disconnected and reconnected.
Most of the time it works perfectly. I’m occasionally seeing that the relay closes correctly at power up , and stays closed for 600 seconds, as desired, The relay then opens.. . usually the relay stays open until the poer is disconnected.
SOmetimes though, after turning off, the timer mysteriously restarts afger approximately 10 minutes   as if the power had been disconnected and reconnected, though the power has remained on.

What could be causing this false triggering ? Do I have the parameters incorrect ?   I think they are correct, because most of the time it works exactly as intended. The rtriggering happens only soemtimes/

I’d appreciate any help !
Thanks !

-jc